pre·lude
                    
                                                                                                              
                                                                                                                                  ˈprel-ˌyüd 
                                                                                                                              
                                                      
                                                          
            ˈprāl-;
                                                                                                                              ˈpre-ˌlüd,
                                                                                                                              ˈprā-;
                                                                                                                              sense 1 also
    ˈprē-ˌlüd 1
                    
                                          
              
          
                                                      : an introductory performance, action, or event preceding and preparing for the principal or a more important matter                                      
                
                    
2
                    
        a
    
          
                                          
              
          
                                                      : a musical section or movement introducing the theme or chief subject (as of a fugue or suite) or serving as an introduction to an opera or oratorio                                      
                
                    
        b
    
          
                                          
              
          
                                                      : an opening voluntary                                      
                
                    
        c
    
          
                                          
              
          
                                                      : a separate concert piece usually for piano or orchestra and based entirely on a short motif                                      
                
                    
            
              preluded; preluding            
        
    
                                
              
          
                                                      : to give or serve as a prelude                                      
                
                                
            especially                
          
                                                      : to play a musical introduction                                      
            
            
                                                      preluder
                                      noun
                                                                            
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  Merriam-Webster unabridged




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